Battle of Pixelgrad was a series of conflicts on pixel.io between /pol/ Nazis and Reddit Communists as well as several other pixel forces around the spring of 2017.
Background
The Battle of Pixelgrad
Progress of the Battle of Pixelgrad
Pixel.io is an .io game site where internet users could make pixel art on a coordinate graph. The graph had an origin point (0,0) and expanded vastly on the X/Y axis. The player could place a pixel of any color on the graph with the click of a mouse. However, there is a timeout period which the player would have to wait to place another pixel. This timeout period was determined by the pixel's relative position to the origin (basically- the further from the origin, the longer the timeout period).
During the spring of 2017, a user on 4chan's /pol/ had posted a screenshot showcasing his pixel artwork of the Reich Iron Cross. This soon caught the attention of Leftbook, CLDMS (prior to its demise ) and Reddit, which acted swiftly to swarm the artwork and change it to a United Front symbol: Half Hammer and Sickle and Half Anarchist A.